Hot Dip Galvanization
All pieces of our steel are welded and then hot dip galvanized before fabrication. The framework for a properly engineered fabric structure is treated to a hot dip galvanized mixture that increases the zinc coating to 3.9mm inside and out.
Hot dip galvanized steel has an exterior zinc coating of .9mm. The dipping process covers the framing materials down to the smallest crevices that go unnoticed by many assemblers. This step helps to maximize structural integrity and creates a tough barrier against corrosive materials. After the metallurgical process, the overall strength increases from 300-500/psi to 3600/psi.
A common misconception is that all fabricated galvanized steel has an interior coating. Most actually have a zinc rich paint applied during the manufacturing process. The hot dip galvanization process ensures an even coating is applied to every surface. The total width of the protective mixture is equal to or greater than the thickness of the steel component.
Thicker structural components increase the load-bearing capacity creating a stronger building that lasts longer. Additional strength like this allows the structure to withstand high winds, temperature fluctuations, and heavy rain or snow falls.
Open Web Trusses
Some fabric building companies build their fabric structures using bent web trusses. While bent web trusses are quicker and sometimes more affordable to fabricate, bent web trusses don’t allow for proper coating of protective zinc.
Improper welding points mean that the access for the hot dip galvanizing liquid is unable to penetrate and coat the inside truss causing weak points in the truss and steel.
Over time, bent web trusses in the fabric structure are more likely to buckle and weaken.
Calhoun’s fabric buildings are built using open web trusses, specifically aerating the corners of our welds so the zinc can fully penetrate the steel during the hot dip galvanization process.
Aerating the corners of our welds ensures our open web trusses are 100% protected from corrosion, inside and out, and won’t ever corrode or buckle from the inside.
Our hot dip galvanized open web trusses result in a stronger overall fabric structure compared to other fabric structure companies in the market.